Dual-Band Shared-Aperture Multiple Antenna System With Beam Steering for 5G Applications

This brief presents a high-efficiency shared-aperture multiple antenna system. Unlike general antennas, the proposed system with size of $0.384 {\times } 0.384 0.171 {\mathrm {\lambda }} ^{3}$ makes high reuse aperture in two respective frequency bands, and structures bands can each generate positive mutual enhancement for their radiating characteristics bands. The flat Luneburg lens realize beam steering capability mm-wave from 25.5 to 29.5 GHz gain 19.3 dBi improve wide-angle scanning matching impedance Sub-6 3.2 3.45 6.2 dBi. Meanwhile, as patch antenna, meta-surface reduce focal distance maintain antenna. Hence, compact achieve capabilities (up 112°) band 56°) gain, respectively. And port isolation between is generally better than 25 dB even up 40 at band. As reported simulated measured results linear array, shows good performance dual-polarization state. candidate 5G applications because high-efficiency, full